History: History of diverticulitis with recent removal of sigmoid colon and colostomy. No history of urologic complaints or problems.

Findings: CT revealed ill-defined mixture of soft tissue and air in the periumbilical region in the post-operative site. This in combination with the patient's history and physical exam are highly suggestive of an infection.
The notable other finding on CT scan was the absence of a kidney in the right retroperitoneal space. Further inspection, however, revealed two left kidneys but also a distal right ureter with normal bladder insertion.

MPX1336_synpic26472: The bladder is filled with iodinated contrast. The right ureter is noted to insert normally into the posterior bladder. The finding of a normal distal right ureter with two left kidneys is characteristic for crossed fused renal ectopia and helps differentiate this case from that of a duplex left kidney which would not have a right-sided ureter.

MPX1336_synpic26472: The bladder is filled with iodinated contrast. The right ureter is noted to insert normally into the posterior bladder. The finding of a normal distal right ureter with two left kidneys is characteristic for crossed fused renal ectopia and helps differentiate this case from that of a duplex left kidney which would not have a right-sided ureter.

History: History of diverticulitis with recent removal of sigmoid colon and colostomy. No history of urologic complaints or problems.

Findings: CT revealed ill-defined mixture of soft tissue and air in the periumbilical region in the post-operative site. This in combination with the patient's history and physical exam are highly suggestive of an infection.
The notable other finding on CT scan was the absence of a kidney in the right retroperitoneal space. Further inspection, however, revealed two left kidneys but also a distal right ureter with normal bladder insertion.